Question

我的模特是这样的。

class Subscriber(models.Model):
    skillset = models.TextField(verbose_name='Skill Set')
    slug = models.SlugField(unique=True, default='')

class SoloDeveloper(models.Model):
    first_name = models.CharField(max_length=30, verbose_name='First Name')
    last_name = models.CharField(max_length=30, verbose_name='Last Name')
    subscriber = models.OneToOneField(Subscriber, related_name='solo_dev', on_delete=models.CASCADE)

我正在尝试保存独奏开发人员并将其分配给订阅者的一对一字段。

def solo_dev_edit(request, slug):
    subscriber = Subscriber.objects.get(slug=slug)

    subscriber_form = SubscriberForm()
    solo_dev_form = SoloDevForm()

    if request.method == 'POST':
        subscriber_form = SubscriberForm(data=request.POST, instance=subscriber)
        solo_dev_form = SoloDevForm(data=request.POST)

        if all[subscriber_form.is_valid(), solo_dev_form.is_valid()]:
            sub = subscriber_form.save(commit=False)
            solo_dev = solo_dev_form.save()
            sub.solo_dev = solo_dev
            sub.save()
            return redirect('solo_dev_view', slug=subscriber.slug)

    else:
        subscriber_form = SubscriberForm()
        solo_dev_form = SoloDevForm()

    return render(request, 'main/solo_dev_edit.html', {
        'sub_fm': subscriber_form,
        'solo_dev_fm': solo_dev_form,
    })

这说不清楚

列中的
空值＆＃34; subscriber_id＆＃34;违反非空约束
DETAIL：失败的行包含（9，john，doe，null）。

我做错了什么？

Answer 1

subscriber上的SoloDeveloper字段不允许空值。并且您尝试在SoloDeveloper之前保存Subscriber - 意味着subscribed_id（订阅者的ID）将为None，从而导致错误。试试这个：

        sub = subscriber_form.save()
        solo_dev = solo_dev_form.save(commit=False)
        solo_dev.subscriber = sub
        solo_dev.save()

Answer 2

想到订户没有被保存，所以我保存了solo dev，直到订阅者被保存。这有帮助。

sub = subscriber_form.save(commit=False)
solo_dev = solo_dev_form.save(commit=False)
sub.solo_dev = solo_dev
sub.save()
solo_dev.save()

无法保存相关对象

2 个答案: